All MIBs › RFC1286-MIB › dot1dBasePortIfIndex
dot1dBasePortIfIndex
Module: RFC1286-MIB
OID (symbolic): RFC1286-MIB::dot1dBasePortIfIndex
OID (numeric): 1.3.6.1.2.1.17.1.4.1.2
Node type: OBJECT-TYPE
Type: INTEGER
Access: read-only
Description: The value of the instance of the ifIndex object, defined in [4,6], for the interface corresponding to this port.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.2.1.17.1.4.1.2 snmpwalk -v2c -c public <target> RFC1286-MIB::dot1dBasePortIfIndex
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.2.1.17.1.4.1.2.1 snmpget -v2c -c public <target> RFC1286-MIB::dot1dBasePortIfIndex.1
Start monitoring vendor-neutral, standards-based MIB, Ethernet/Token Ring transparent bridges and early Layer 2 switches with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the RFC1286-MIB::dot1dBasePortIfIndex OID value, configure state conditions and alerts, and monitor any vendor-neutral, standards-based MIB, Ethernet/Token Ring transparent bridges and early Layer 2 switches from a single console.
OID Breakdown
Upper-level ancestors (10 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.2 | mgmt | AXON-MIB |
| 1.3.6.1.2.1 | mib_2 | AXON-MIB |
| 1.3.6.1.2.1.17 | dot1dBridge | BRIDGE-MIB |
| 1.3.6.1.2.1.17.1 | dot1dBase | BRIDGE-MIB |
| 1.3.6.1.2.1.17.1.4 | dot1dBasePortTable | BRIDGE-MIB |
| 1.3.6.1.2.1.17.1.4.1 | dot1dBasePortEntry | BRIDGE-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.2.1.17.1.4.1.2 | dot1dBasePortIfIndex | RFC1286-MIB |
FAQ
What does dot1dBasePortIfIndex link together?
It maps a bridge port number, as used throughout the bridging tables, to the ifIndex of the actual network interface in the standard Interfaces MIB — so you can correlate bridge/STP state for a port with that interface's link status and traffic counters.
I have a legacy switch reporting via RFC1286-MIB instead of BRIDGE-MIB — does dot1dBasePortIfIndex mean the same thing?
Yes — RFC1286 predates the current BRIDGE-MIB (RFC 1493/4188) but defines this object identically: it's the same ifIndex cross-reference. If the device supports both MIBs, you should see matching values for the same physical port in either table.